The Banishment spell states the following two things:
If the target is native to the plane of existence you’re on, you banish the target to a harmless demiplane.
If the target is native to a different plane of existence that the one you’re on, the target is banished with a faint popping noise, returning to its home plane.
But what if Banishment is cast within a demiplane?
My guesses are the following:
- Native: only the creator of the demiplane is considered native and is temporarily banished to another demiplane for the duration of the spell.
- Non-native: anyone not the creator of the demiplane is considered non-native and is sent back to their original plane of existence.
I should clarify that I do not just mean demiplanes created by the Demiplane spell, but also demiplanes that are far more vast and actual campaign settings in their own right.
Am I to believe that under RAW, anyone and everyone would be kicked out of such demiplane settings, including their creators and inhabitants who were born there? It seems rather game-breaking.
Ultimately, the question is, under which circumstances, if any, can someone be considered native to a demiplane?
Best Answer
Based on the ordinary English sense of the word "native", only creatures that actually originated in a demiplane are natives of that plane. In most cases (e.g., when the demiplane spell is used), the demiplane has no inhabitants, and thus no creature is native to that demiplane. Certainly there's no reason to conclude that the caster of a spell that creates or accesses a given demiplane is a "native" of that plane.
But this is a corner case, and individual DMs might have specific ideas about how they would like it to be handled. There's no real game balance issue here.